FEZ1 Phosphorylation Regulates HSPA8 Localization and Interferon-stimulated Gene Expression

Overview

Journal Cell Rep

Publisher Cell Press

Specialties Biology
Cell Biology
Molecular Biology

Date 2022 Feb 16

PMID 35172151

Authors

Viacheslav Malikov

Nathan Meade

Lacy M Simons

Judd F Hultquist

Mojgan H Naghavi

Affiliations

Soon will be listed here.

Abstract

Fasciculation and elongation protein zeta-1 (FEZ1) is a multifunctional kinesin adaptor involved in processes ranging from neurodegeneration to retrovirus and polyomavirus infection. Here, we show that, although modulating FEZ1 expression also impacts infection by large DNA viruses in human microglia, macrophages, and fibroblasts, this broad antiviral phenotype is associated with the pre-induction of interferon-stimulated genes (ISGs) in a STING-independent manner. We further reveal that S58, a key phosphorylation site in FEZ1's kinesin regulatory domain, controls both binding to, and the nuclear-cytoplasmic localization of, heat shock protein 8 (HSPA8), as well as ISG expression. FEZ1- and HSPA8-induced changes in ISG expression further involved changes in DNA-dependent protein kinase (DNA-PK) accumulation in the nucleus. Moreover, phosphorylation of endogenous FEZ1 at S58 was reduced and HSPA8 and DNA-PK translocated to the nucleus in cells stimulated with DNA, suggesting that FEZ1 is a regulatory component of the recently identified HSPA8/DNA-PK innate immune pathway.

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